windows线程消息

#define WM_P2P_AUDIO_REQ        WM_USER + 34

BOOL PostThreadMessage(  DWORD idThread,   UINT Msg,   WPARAM wParam,   LPARAM lParam ); 

if (PeekMessage(&msg, NULL, 0, 0, PM_REMOVE))
  {
   if (msg.message == WM_QUIT)
   {
    TRACE("WM_QUIT/n");
    printf("WM_QUIT/n");
    break;
   }
    
   switch(msg.message) 
   {
   case WM_P2P_AUDIO_REQ: